工具类DbHelper.ttinclude:
<#@ assembly name="System.Core.dll" #> <#@ assembly name="System.Data.dll" #> <#@ assembly name="System.Data.DataSetExtensions.dll" #> <#@ assembly name="System.Xml.dll" #> <#@ import namespace="System" #> <#@ import namespace="System.Xml" #> <#@ import namespace="System.Linq" #> <#@ import namespace="System.Data" #> <#@ import namespace="System.Data.SqlClient" #> <#@ import namespace="System.Collections.Generic" #> <#@ import namespace="System.IO" #> <#+ public class DbHelper { public static List<DbTable> GetDbTables(string connectionString, string database) { string sql = $@"SELECT obj.name as TableName ,prop.value as TableRemark from {database}.sys.objects obj left join {database}.sys.extended_properties prop on prop.major_id=obj.object_id and prop.minor_id=0 where obj.type=‘U‘ and obj.name<>‘sysdiagrams‘"; DataTable dt = GetDataTable(connectionString, sql); return dt.Rows.Cast<DataRow>().Select(row => new DbTable { TableName = row.Field<string>("TableName"), TableRemark = row.Field<string>("TableRemark")??"" }).ToList(); } public static List<DbColumn> GetDbColumns(string connectionString, string database, string tableName) { #region SQL string sql = $@" WITH indexCTE AS ( SELECT ic.column_id, ic.object_id FROM {database}.sys.indexes idx INNER JOIN {database}.sys.index_columns ic ON idx.index_id = ic.index_id AND idx.object_id = ic.object_id WHERE idx.object_id =OBJECT_ID(‘{tableName}‘) AND idx.is_primary_key=1 ) select CAST(CASE WHEN indexCTE.column_id IS NULL THEN 0 ELSE 1 END AS BIT) IsPrimaryKey, CAST(CASE WHEN colm.default_object_id =0 THEN 0 ELSE 1 END AS BIT) IsDefaultKey, colm.name ColumnName, systype.name ColumnType, colm.is_nullable IsNullable, prop.value Remark from {database}.sys.columns colm inner join {database}.sys.types systype on colm.system_type_id=systype.system_type_id and colm.user_type_id=systype.user_type_id left join {database}.sys.extended_properties prop on colm.object_id=prop.major_id and colm.column_id=prop.minor_id left join indexCTE ON colm.column_id=indexCTE.column_id AND colm.object_id=indexCTE.object_id where colm.object_id=OBJECT_ID(‘{tableName}‘) order by colm.column_id"; #endregion DataTable dt = GetDataTable(connectionString, sql); return dt.Rows.Cast<DataRow>().Select(row => new DbColumn() { IsPrimaryKey = row.Field<bool>("IsPrimaryKey"), IsDefaultKey = row.Field<bool>("IsDefaultKey"), ColumnName = row.Field<string>("ColumnName"), ColumnType = row.Field<string>("ColumnType"), IsNullable = row.Field<bool>("IsNullable"), Remark = row.Field<string>("Remark")??"", }).ToList(); } public static DataTable GetDataTable(string connectionString, string commandText, params SqlParameter[] parms) { using (SqlConnection connection = new SqlConnection(connectionString)) { SqlCommand command = connection.CreateCommand(); command.CommandText = commandText; command.Parameters.AddRange(parms); SqlDataAdapter adapter = new SqlDataAdapter(command); DataTable dt = new DataTable(); adapter.Fill(dt); return dt; } } } /// <summary> /// 表结构 /// </summary> public sealed class DbTable { /// <summary> /// 表名称 /// </summary> public string TableName { get; set; } /// <summary> /// 表描述 /// </summary> public string TableRemark { get; set; } } /// <summary> /// 表字段结构 /// </summary> public sealed class DbColumn { /// <summary> /// 是否主键 /// </summary> public bool IsPrimaryKey { get; set; } /// <summary> /// 是否默认值 /// </summary> public bool IsDefaultKey { get; set; } /// <summary> /// 字段名称 /// </summary> public string ColumnName { get; set; } /// <summary> /// 字段类型 /// </summary> public string ColumnType { get; set; } /// <summary> /// 是否允许空 /// </summary> public bool IsNullable { get; set; } /// <summary> /// 描述 /// </summary> public string Remark { get; set; } /// <summary> /// 数据库类型对应的C#类型 /// </summary> public string CSharpType { get { return SqlServerDbTypeMap.MapCsharpType(ColumnType); } } /// <summary> /// /// </summary> public Type CommonType { get { return SqlServerDbTypeMap.MapCommonType(ColumnType); } } } /// <summary> ///ORM 类型转换 /// </summary> public class SqlServerDbTypeMap { public static string MapCsharpType(string dbtype) { if (string.IsNullOrEmpty(dbtype)) return dbtype; dbtype = dbtype.ToLower(); string csharpType = "object"; switch (dbtype) { case "bigint": csharpType = "long"; break; case "binary": csharpType = "byte[]"; break; case "bit": csharpType = "bool"; break; case "char": csharpType = "string"; break; case "date": csharpType = "DateTime"; break; case "datetime": csharpType = "DateTime"; break; case "datetime2": csharpType = "DateTime"; break; case "datetimeoffset": csharpType = "DateTimeOffset"; break; case "decimal": csharpType = "decimal"; break; case "float": csharpType = "double"; break; case "image": csharpType = "byte[]"; break; case "int": csharpType = "int"; break; case "money": csharpType = "decimal"; break; case "nchar": csharpType = "string"; break; case "ntext": csharpType = "string"; break; case "numeric": csharpType = "decimal"; break; case "nvarchar": csharpType = "string"; break; case "real": csharpType = "Single"; break; case "smalldatetime": csharpType = "DateTime"; break; case "smallint": csharpType = "short"; break; case "smallmoney": csharpType = "decimal"; break; case "sql_variant": csharpType = "object"; break; case "sysname": csharpType = "object"; break; case "text": csharpType = "string"; break; case "time": csharpType = "TimeSpan"; break; case "timestamp": csharpType = "byte[]"; break; case "tinyint": csharpType = "byte"; break; case "uniqueidentifier": csharpType = "Guid"; break; case "varbinary": csharpType = "byte[]"; break; case "varchar": csharpType = "string"; break; case "xml": csharpType = "string"; break; default: csharpType = "object"; break; } return csharpType; } public static string MapDBType(string dbtype) { if (string.IsNullOrEmpty(dbtype)) return dbtype; dbtype = dbtype.ToLower(); string csharpType = "object"; switch (dbtype) { case "bigint": csharpType = "DbType.Int64"; break; case "binary": csharpType = "DbType.Binary"; break; case "bit": csharpType = "DbType.Boolean"; break; case "char": csharpType = "DbType.String"; break; case "date": csharpType = "DbType.DateTime"; break; case "datetime": csharpType = "DbType.DateTime"; break; case "datetime2": csharpType = "DbType.DateTime2"; break; case "datetimeoffset": csharpType = "DbType.DateTimeOffset"; break; case "decimal": csharpType = "DbType.Decimal"; break; case "float": csharpType = "DbType.Double"; break; case "image": csharpType = "DbType.Binary"; break; case "int": csharpType = "DbType.Int32"; break; case "money": csharpType = "DbType.Currency"; break; case "nchar": csharpType = "DbType.StringFixedLength"; break; case "ntext": csharpType = "DbType.String"; break; case "numeric": csharpType = "DbType.Decimal"; break; case "nvarchar": csharpType = "DbType.String"; break; case "real": csharpType = "DbType.Single"; break; case "smalldatetime": csharpType = "DbType.DateTime"; break; case "smallint": csharpType = "DbType.Int16"; break; case "smallmoney": csharpType = "DbType.Decimal"; break; case "sql_variant": csharpType = "DbType.Object"; break; case "sysname": csharpType = "DbType.Object"; break; case "text": csharpType = "DbType.String"; break; case "time": csharpType = "DbType.DateTime"; break; case "timestamp": csharpType = "DbType.Binary"; break; case "tinyint": csharpType = "DbType.Byte"; break; case "uniqueidentifier": csharpType = "DbType.Guid"; break; case "varbinary": csharpType = "DbType.Binary"; break; case "varchar": csharpType = "DbType.AnsiString"; break; case "xml": csharpType = "DbType.Xml"; break; default: csharpType = "DbType.Object"; break; } return csharpType; } public static Type MapCommonType(string dbtype) { if (string.IsNullOrEmpty(dbtype)) return Type.Missing.GetType(); dbtype = dbtype.ToLower(); Type commonType = typeof(object); switch (dbtype) { case "bigint": commonType = typeof(long); break; case "binary": commonType = typeof(byte[]); break; case "bit": commonType = typeof(bool); break; case "char": commonType = typeof(string); break; case "date": commonType = typeof(DateTime); break; case "datetime": commonType = typeof(DateTime); break; case "datetime2": commonType = typeof(DateTime); break; case "datetimeoffset": commonType = typeof(DateTimeOffset); break; case "decimal": commonType = typeof(decimal); break; case "float": commonType = typeof(double); break; case "image": commonType = typeof(byte[]); break; case "int": commonType = typeof(int); break; case "money": commonType = typeof(decimal); break; case "nchar": commonType = typeof(string); break; case "ntext": commonType = typeof(string); break; case "numeric": commonType = typeof(decimal); break; case "nvarchar": commonType = typeof(string); break; case "real": commonType = typeof(Single); break; case "smalldatetime": commonType = typeof(DateTime); break; case "smallint": commonType = typeof(short); break; case "smallmoney": commonType = typeof(decimal); break; case "sql_variant": commonType = typeof(object); break; case "sysname": commonType = typeof(object); break; case "text": commonType = typeof(string); break; case "time": commonType = typeof(TimeSpan); break; case "timestamp": commonType = typeof(byte[]); break; case "tinyint": commonType = typeof(byte); break; case "uniqueidentifier": commonType = typeof(Guid); break; case "varbinary": commonType = typeof(byte[]); break; case "varchar": commonType = typeof(string); break; case "xml": commonType = typeof(string); break; default: commonType = typeof(object); break; } return commonType; } } #>
新建文本模板Model.tt：
<#@ template debug="false" hostspecific="false" language="C#" #> <#@ output extension=".cs" #> <#@ assembly name="System.Core.dll" #> <#@ assembly name="System.Data.dll" #> <#@ assembly name="System.Data.DataSetExtensions.dll" #> <#@ assembly name="System.Xml.dll" #> <#@ import namespace="System" #> <#@ import namespace="System.Xml" #> <#@ import namespace="System.Linq" #> <#@ import namespace="System.Data" #> <#@ import namespace="System.Data.SqlClient" #> <#@ import namespace="System.Collections.Generic" #> <#@ import namespace="System.IO" #> <#@ include file="DbHelper.ttinclude" #> using Dapper.Contrib.Extensions; using System; //------------------------------------------------------------------------------ //生成时间 <#=DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss")#> //------------------------------------------------------------------------------ <# foreach(var dbTable in DbHelper.GetDbTables(config.ConnectionString, config.DbDatabase)) {#> /// <summary> /// <#=dbTable.TableRemark#> /// </summary> [Table("<#= dbTable.TableName #>")] public class <#= dbTable.TableName #> { <# foreach(DbColumn column in DbHelper.GetDbColumns(config.ConnectionString, config.DbDatabase, dbTable.TableName)){#> /// <summary> /// <#=column.Remark#> /// </summary> <#if (column.IsPrimaryKey) { if (column.IsDefaultKey)#>[Key] <#else#>[ExplicitKey] <#}#> public <#= column.CSharpType#><# if(column.CommonType.IsValueType && column.IsNullable){#>?<#}#> <#=column.ColumnName#> {get;set;} <#}#> } <#}#> <#+ public class config { public static readonly string DbDatabase="dbName"; public static readonly string ConnectionString=$"Data Source=.;Initial Catalog={DbDatabase};User ID=sa;pwd=xxx"; } #>